Print developing machine



Nov. 14, 1944. R. sARDEsoN Erm. 2,362,587

PRINT DEVELOPING MACHINE y Filed Aug. 29. 1941 5 sheets-sheet 1 Nov. 14, 1944- RsARDEsoN E'AL 2,362,587

PRINT DEVELOPING MACHINE Filed Aug. 29, 1941 5 Sheets-Sheet 2 Nov.- 14, 1944. R. sARDEsoN Erm.

PRIN'T DEVELOPING MACHINE Filed Aug. 29. 1941 5 Sheets-Sheet 5 WW1 z i mmmwmm WWW [fpm/mf 714k www Nov. 14, 1944. R. sARDEsoN ETAL PRINT DEVELOPING MACHINE Filed Aug. 29, 1941 5 Sheets-Sheet 4 Nov. 14, 1944. n sARDEsoN l-:TAL

PRINT DEVELOPING MACHINE Filed Aug. 29. 1941 5 Sheets-Sheet 5 ESTKIZ mil.

#WWW/ff. D/J5 i 4112257;

R ar e? Patented Nov. 14, 1944 U'Nl'rsfo "STATES PArEN-T OFFICE lRohert .Sardesom Lester D. -Eriel, Harry Merwin .'Dye, and Glen M; Dye, Minneapolis, Minn., as-

signors to Pako Corporation, Minneapolis, Minn., a corporation of Delaware 'iApplicationAugust 29, 1941, Serial No. 408,824

` zo claims.

"This vrinventionrrelates :to 'aw-machine for handling photographic prints and sucha `machine :as will 'handle -a'great :range--in'size ofsprints from very smallfprintstoilarge isizes. x While the machine in itspreferred embodiment is used for developing prints" and `-using developing liquid, `it couldV also bensedfor-treating prints with other liquids. Inv commercial` establishments :where a large number of prints are handled vthesame are printed by the` operators andthenplaced on the conveyor of fthe developing. rnachinefl and subsem'and-submerging themin thedeveloping liquid so that all parts of fthe print Aare'properly `contacted by the liquid. .f

Itis also anfobi'ectloi the invention to provide a `machine 'for "handling yphotographic prints comprising a 'tray-containing 4the `treating liquid, a -submergi-ng means :for the prints comprising a wheel havingvanes extendingtra'nsverselyof said tray withnovel and `e'iiicient means for diif recting prints to said submerging means. K

`It is afurther robject of the invention to provide agmachine for handling-photographic prints comprising a tray-adapted 'to `contain liquid,said `tray Ahaving `ridgesextendingtransversely oty its bot-tom, which ridges "aref-preferably of A substantially invertedv VJshape together :withl a-submerg ing `wheel. at the forward'iend (oiA said `tray having "vanes extending "transversely Aof= said `tray,

said `vanes at the :bottomfofrsaidvwheelfmoving t.,

inlet and outlet openings @communicating `with said pan, said pan having'a drain openingua't one end, said pan being normally supported fin substantially horizontal position-and anlauxiliary `supporting means for said end `of said pan onwhich it may be supported-at a lower level; .to drain said pan. z

`It is still anotherobject of the invention `to providel a machine for'treating photographic prints comprising a tray adapted to `containthe treating liquid, a conveyor vfor `feeding printsto said tray i with a novel-means `for driving vsaid conveyor so that it can bequickly `and easily removed. 'f It is a further object of .fthe-invention toprovide a machine for-treatingphotographic prints comprising a tray adapted tocontainl developing `liquid together with simple and efficient means Ifor maintaining said liquid `at the desired tem-l iperature. r i n These and other `objects and advantages `will more `fully appear from the followingdescription made in f-conn'ection with the accompanying close l to' the surface and :top of 'the adi acentmridge.,

Itis still another-object*of the in-ventioneto provide er1-machine :for treating photographic vprints compris-ing a :tray adaptedto'oontain'developing liquid. means for?V feeding prints i -to the 4forward end of --said tray fand fsubmerging ithem in the Vliquid,-sa.-id liquid1 beingrimpelled :to Vmove toward .the Vrearffend'bf said tray "together with means `for causing-the liquid -ftohave a1 quietzone or a zone of -fsmal'bmovementwat -th'erearI end of said tray. 2

Anotheriobject-of-the inventionis` to provide afmachine for treating photcgraphicprints comprising a tray "adaptedfto'f contain liquid; a pan in which :said `traywis"supported,^said tray having drawings in which like referenee'characters` re- `fer'tosirilar parts throughout'thef several views and in which:

Fig. 1 `is a' chine; Fig. 2 is a plan viewfof the `conveyor for feeding the prints; 1 i

Fig. 3 is a verticalsection taken on line 3--3 `of Fig. 2 as indicated by the arrows;

Fig. 4 is a vertical sectiontakenfon line 4-4 of Fig. 2 as indicated by the arrow;l

Fig. 5 isa longitudinal verticalfsection taken substantially on line 5-5 of Fig. 13; "Fig 6 is a partial vertical section similar to Fig. 5 shownon an enlargedscale;

l Fig. 7 is a View similar to vFig."6 showing some additional parts; i il Fig. 8 is a perspective View of a vane of the sub*- merging wheel or ducker; v

view in side elevation Aof said i ma- Fig. 9 is a view in front `elevation'of the maf chine, some parts being broken away and shown in verticalsection;

Fig. 10 is a View in rear elevation of thema chine,some parts being showninvertical section;

others Fig. 11 is a view inside elevation-showingthe 1 Fig. 12 is a vertical section taken on line 1l 2-12' of` Fig. 13 as indicatedbyfther-arrows;, v. Fig.` 5 is a top plan view of rthei-maohine.some

parts being broken away and others shown in horizontal section;

Fig. 14 is a partial plan view of the frame and other parts, some parts being broken away and others shown in horizontal section;

Fig. 15 is a view in front elevation of the print guide, some parts being broken away and others shown in vertical section;

Fig. 16 is a horizontal section taken on line |6|6 of Fig. 15 as indicated by the arrows; and

Fig. 1'7 is a vertical section taken on line 1 of Fig. 15 as indicated by the arrows.

Referring to the drawings a machine is shown comprising a main frame 20 having longitudinally extending side portions 20a and end portions 20b. While this frame could be variously made, in the embodiment of the invention illustrated it is shown as formed of angle-bars. Said frame is supported at its forward end upon leg members 2| connected thereto in any suitable manner as by screws 22. Legs 2| are shown as having offset vertical iianges disposed atthe inner sides of frame member 20 through -which screws 22 pass, said frame thus resting on the ledge formed by said oifset portions. vAt its rear end frame 2U has secured thereto leg members 23 similar to leg members 2|. While leg members 2| and 23 could be variously made, in the embodiment of the invention illustrated they 'are shown as of right angular form in horizontal cross section and tapering in width toward their lower ends. Leg members 23 are secured to the frame 20 in a manner similar to leg members 2| by the bolts 22. Leg members 23 have journaled therein and extending therebetween a substantially horizontal headed rod 24. Rod 24 has heads at the outer sides of legs 23 and at the inner sides of said legs the same hassecured thereto cam members 26. Each leg member 23 also has secured to its inner side vertically spacedv angular guide brackets 21 and 28 having horizontal anges with vertically aligned apertures therethrough. A rod 29 is movable through said apertures in the brackets on each leg 23. the upper end of which engages cam 26. Cams 26 have eccentric cam surfaces engaging the tops of rods 29 and are provided with lips 26a. forming stops. A handle 30 is secured to rod 24 in any suitable manner as by the set screw 3|. As shown in Figs. 5 and 10k rods 29 normally engage the oor or supporting surface and the bottoms of legs 23 are somewhat above said i'looi or supporting surface. The cams 26 can be oscillated by turning rod 24 by means of handle 30, thus permitting' rods 29 to move upward and'permitting legs 23'to engage the oor or supporting surface. f

A pan 34 rests upon frame 2i), the same being illustrated as having sides and ends ush with the sides and ends of said frame.A While pan 34 could be variously made, in the embodiment of the invention illustrated it is shown as having a metal body 34a surrounded at its sides by a `body of waterproof material 34o of some suitwith a refrigerating apparatus 38 carried in suitable brackets 39 secured to frame 20 beneath the saine. The refrigerating apparatus per se forms no part of the present invention and is not specifically illustrated except insofar as it comprises coils 38a containing the refrigerating fluid, which coils engage a plate 40 which is in contact` with the Abottom of pan 34 or its body portion 34a. Insulating material 4| is disposed below coils 38a and held `by a casing 42 resting on a plurality of plate springs 43 secured to a plate 44 carried in brackets 39. Plate 40 is thus kept quite cold and is resiliently held by springs 43 against the bottom of pan 34. Plate 40engages'the bottom of pan 34 at the forward portion of said pan and the rearward portion of said pan has its bottom engaged by a body of insulating material'46 such as cork, the same beingl carried in a casing 41 supported on transversely extending angle brackets 48 bolted to `frame 2|), one of which also supports one of the brackets 33.

Disposed within the pan 34 is a tray 5U. While this tray could be variously formed, it is illustrated as rectangular in plan and transverse cross section and is provided with spaced projections 50a on its bottom which engage the bot- ,torn of pan 34 so that the bottom of said tray is held above the bottom of said pan. A pair of pins'5| project upwardly from the bottom of pan 34 adjacent its front end and pass throughv aligning apertures in the bottom of Vtray 5U, thus positioning said tray in said pan. Said tray 50 has a corrugated bottom, the same having extending transversely thereof ridges 50b being shown as substantially of inverted V-shape in cross section. Tray 50 has a series of holes 50c in its front wall and is also provided with a plurality of holes 50d adjacent its rear end, which holes are shown as passing through the rear sides of certain of the ridges 50o. Adjacent the front end of tray 50 is disposed a. submerging means or ducker 52.- Thiscomprises a wheel having a plurality of spaced circular disks 52a having hubs secured to a central shaft 52o in any suitable manner as by pins or screws 52e. The disks 52a are provided with a plurality of equally and circumferentially spaced slots being shown as substantially of circular form in which fit the thickened edges or beads 52e of the vanes 52f, which vanes project outwardly radially from the disks 52a. The central shaft 52o projects beyond tray 50 and pan 34 and rests in open-topped bearings 54 secured to the sides of frame 20. A collar 55 is secured to shaft 52h in any suitable manner as by the pin or screw 56, the same engaging the inner side of one of the bearings 54. At the outer side of said bearing shaft 52h has secured Vthereto a friction wheel 51 by which wheel 52 is driven which will be later described. The vanes 52f each have a series of open ended slots 52g kformed in their outer sides and print guiding means `58 is provided, the same comprising a series of spaced small rods or wires 58a which extend vertically at the front side of wheel 52 and thencurve downwardly beneath said wheel in a substantially circular arc which is approximately-concentric with the center of shaft 52o.

Rods 58a' are securedin a supporting bar or rod 58h fwhich is secured at its ends in a pair of standards 58e. As shown in Fig. 7 said standards are slotted at the top and bored to receive rod 58h and said 'rod is clamped therein by the screws 58d extending through the slotted portion. As a simple and convenient method of securing the meoeivedfin thelopeningsdn u-shapedhraeketsl .secnnedbopposite sides offthe fre-me .2.0. lt will moted .that'the rods A5.80 arelegualeinf-.Ikumber -`2.1mm finrfsuch relation :that: each vane :5.2i4 ,has :putermedgeffmowing close to2-the vtop `lsurdce .toitsad-J-rldge fand aclose vto the .topa portionztheneof ;.as 4:wheel` `15.2 .rotates l l .+A vplate-6l is disposed rjust ;azbove lthe .frontend '-.pm'tionzofy tray-25.0, .thesameA being 1inolnediidomm- .madly/andrearwardly Ito-ward.; said `tromseid 'plate :being .secured `to al frode: 6.5. Ew-,h-oh; l is .decilrlataihly mounted :in open-toppedfbealrings 5.5535eqeured to thegeidesuof fremeva'lll. :Itfwillbegnoted *Jesi A Pulley- J6 is` .scoured toi a .stub @blaft l1 g ,riyeted l:one of :fthehxjaekets .51.. Pulley; 116. pasean eutvMaudit?. .prqjeetne `hub .surrounded doyen, .annular asfacrank om :5

elined-portiensxdllg led a 'stdin--r the inner edges of belts Ia. .As shown in Fig: 14, the rod I I4has` free ends being centrally'by the stud II3.

- In operation the machine is customarily locatedA v ,the plate 64. '1l'1e'plate"64, owing to projections 64a, vengages the prints at spaced points and duev to the oscillation of this plate, 'the prints are dis'.-

charged into the front end ofjtray 50.5 As already described, plate 64 is oscillated quite rapidly by eccentric 12 and the link 1I through arm 684. It has beenv found desirable to oscillate plate 64 'to positively insure that none of the prints stick or stop a1; this point. A certain distance must bedetermined'between plate 64 and wheel 52. Some prints'are about of postage'stamp size'while others are quite large. It is in order to have al1 sizes of prints properly delivered into tray 5D that plate 64 is oscillated. VAs already described, the wheel 1.9 is' rotated from shaft 13 bybelt 15 and this rotates wheel 51 ysecured 'top the paddle wheel or ducker 52. Wheelv 52 'is' revolvedwith its forward `end moving downwardly along the rods 58a. yThe wheel 52 with its paddles 52f causes the developing liquid in tray 50 to moveA rearwardly in said tray. The printswhich have been discharged from 'plate 64 into the developing liquid lthus movetoward the rods 58a and arev guided thereybeneatlri and pass beneath said rods and under the vanes' of the wheel 52. With the provision of the rods 58a and the vanes 5 2f itis insured that all parts of the prints will be submerged and wetted and thus covered bythe developing liquid. The prints tendvtocurl at their edges and thus act only -supported tray 50as indicated by thearrows in Fig'.13 and also passes forwardlyv in the space beneath the bottom of tray 50 and the bottom of pan 34. The liquid then enters the tray to continue itsv rearward movement through the holes 50c at the front of the tray. The rearward movement of the liquid upon reaching holes 50d is progressively retarded and at the rear portion of the tray 50 the liquid is quiescent. The prints thus slow up progressively toward the rear portion of the tray and beyond the holes 50d have no motion at-all and they can thus remain in the developing liquid until they are sufficiently developed and removed by the operator. The large volume of print developing business is in the summer when'the tem- A perature is rather high. 'lIt is desirable to keep the to keep these edges from contact with the liquid.

lWithout the rods 58a some prints might get by the wheel 52 with some of their edge portions still dry.. The prints pass from the wheel 52 beneath the samevover the.top of the rst ridge h. It has been found in practice that it is important to have the proper relation between the vanes 52f and this first ridge. The: outer edges of the vanes have been arranged to pass close to the adjacent surface of said ridge 'and close to the top thereof. If the ridge is positioned somewhat further rearwardly of the wheel a pulsation or eddy of the liquid .occurs which tends to suck the prints toward the wheel and prevent their further movement rearwardly. With the present arrangement the prints are completely submerged and wetted and progressed rearwardly as desired. The prints continue to *movey rearwardly in tray 50 with the currentl of liquid and'in practice the operator watches-.the prints and when they are sufliciently developed she removes them and they are then transferred for fur-ther treatment.` Some prints must remain inthe developingA liquid much longer `than others'and it is desired to have the prints slow up in their movement or substantially come Saidliquid then lpasses forwardly at the sidesl oi developing liquid from becoming too heated. For

.this purpose the refrigerating apparatus 38 in casing 39 is provided and theI coils 38a in which refrigerating fluid is contained are soldered to the plate 40 which is held against the bottom of pan 34 by the springs 43, said coils being directly engaged by the insulated material or cork 4I in the casing 42. The insulating material 46 in casing 41 also acts to prevent heating of the developing liquid by the air in thesurrounding room. 'I'he tray 50 and pan 34 must be drained at frequent intervals and as described, the drain pipe 35 is provided at the 'rear v'end of pan 34. Tray 50 and pan 34 are normally in substantially horizontal position. To speed vup the draining operation and save, time thel members 29 and accompanying mechanism are provided. When the pan is to be vdrained lthe operator swings handle 30, thus rotating the cams 26 and permitting rods 29 to rise so that the legs 23 come'in contact with the iloor. The pan 34 then is inclined toward its rear end andthe draining operation is rapidly accomplished. When .the pan is to be provided with freshfluid the handle 30 will again be swung so that cams 26 push down the rods 29 again bringing tray 34 to horizontal position.' The oam's with stops 26a and rods 29 are so arranged thatthe'y are in stable position with rods 29 depressed.

The parts of the machine are arranged so that they can be very easily andquickly removed or disassembled. It is necessary to frequently re'- Vattached and its central shaft 52h rests in the open-topped bearings 54. The guide means 5 8 can then be lifted by simply lifting its side portions 58e from their sockets in brackets 6U. The

plate 64 can be removed by being merely lifted as its rod 66 is supported in open-topped bearings 65. Rod 66 will then be movedvendwise to remove pin 10 from link 1 I. With the wheel 5,2, the guide means 58 and the plate 64 removed, the tray 50 can be lifted'and removed. Tray 50 could be removed without removing plate 64. By removing the two screws I09 the conveyor I D5 can be moved away from the frame 2D. The belts |Il5a can be moved over the ends of the tensioning rod or roller l I4. 'I'his releases the belts from this rod I I4 as well as from drivingroller I I6. It will be noted that the outer side of the beltengages roller II6. l

From the above description it will be seen'that we have provided an extremely efficient print treating machine with a very novel arrangement and construction of parts. The construction has been arrived at after a study of the actual problems encountered over along period of time.. The

constuctioni has beensimpliriedftoi @great-:degree and'lthe :parte arranged :so rthat'fthe:` necessaryi L changing of liquid and cleaning can bel-quicklyY and@ easily performed;V Thei macl'iine@has` been amplylsdemonstratedyinactuariziractice;` found yto1 5 beivery successful` and efficient and l is'fbeingrfput 1 into production;` l l It will; of `coursegube understood ithat various* changes may bef made iini-the-form, detailsearrangementv4 and'proportions of'the parts; with:- 10sta'tionaryftray .containing liquid-meansfoifeed out'` departing from the-scope of applicants in#V vention,A vwhich generally stated, consists-in a 1de# vice't capable of carryingri 'out the 1obi'ectsfr above set' forth, in the `parts and combinationsof partsy discloseduand defined. in the; appended clainisi.; l5

What is claimed is: i i

1. A-` Aplrotd 1 eprint handling i" de-vic'elL halving 1in combination,l a' f tray adapted to:` `contaiifii liquid." means forffeeding` prints fto `said;` tray,- a dulckerf ingipri'nts' to'said tray, `a ducker at thei forwards,w end.; of said tray adjacent-1 said: meansA comprising@dv al rotating paddle wheel having i varies' `extending: transversely .of saidttray `and movable'rearwardly; im saidzliquid' and inducing an .current infsaid' liquidi rearwardly',` said wheeljhavingtrunni'onss atiitsf ends; a` pany in 4whiclrsaid tray is supported-andi open-topped Vbearings at the 'sides' oi'v said apanwin' which said trunnions are supported, sorthatfsaidt adjacent'saidsmeans' comprisingifarotatingi paddle? 204 WheelV may beflifted from vsaid vbe'aringsiand, bodily wheeli having. varies` extendingW transversely'l ci: said tray throughoutifthe `widtlri thereof, said. varies v'moving throughithe liquicirin .said trayiito' 1 engage prints with their edgesv andlfflat sidesfito f removeditoffaci'litate removal of, said tray;

8; A `photoy print' handling ldevcef'haivingha esta"- tionary tray :containing liquid; meansiorfdelivr ering prints to saidztray, a frame 'havingixsiddl suhmergefsaic printsuin.saidiiquidana anciana 2li?members,` a submereing: means 4ycomrnrisina ingr-to induce a fcurrent` of said liquid` rearwardlyf of said tray. and meansc1ose1yadjacentthe front` side iof= said wheellfor; guiding-@prints 1 thereunder;

2;The1structure setsforth in uclainrl, said tray n padd'lesvvheelV extending transverselymf said trayff adjacent said means, trunnions; extending:.frornc` the-endsoi saidiwheel; a driving wheel carried by one of said trunni'ons and adaptedto. rest"v having iridges:extending..x transverselyLthereoflof'- 30"* against a-friction driving :wheel: open-top'ibeairatsubstantially7- inverted v-'sliape adjacent i saidd wheel, said wheeltbeingiso located' that the vanesl ot said Wheelirr their upwardfmovement' deiinea-path` substantially tangent to Ithe tcp*I surface otthe adjacentridge 3.t `A r ph'otoi i print handling device having: :LinV combination.; a i `tray adapted" `to `contain l liquid, meansnfor feeding .prints Ito saidl tray, a duckercomprising a rotating paddleiwheel :naviifigizvanes-V extendingtransverselyccrvsaid travi;a said varies 0" i mergefprintsfin saidzili'quid and to induceia cur,-

peripheryi ofisaidrwheei fori guiding lpi'int'sf to and 45 undersaid-wheels i i 4i.: A photo print handii'ng` device` comprising lair trap ;adapted-tocontaiiniliquidf means :forf'feedingtif printsto said trayfaplate extendinglin fclown-4 5 WardlyV position toward i said: tray'at` the;

front end'. oi sind:` tray-:to whicinf the prntsiare delivered f and i means"` for oscillatably vibrating, saidiplat'e `to discharge said"` prints therefromfl 5. A i photo print `handling zdevice= comprisingl a- 55 tram adapted :tov contain'liquid',V Ameansifcrf feeding4 A prints= to said tray, afplate extendingi1-ifdown:-v

wardly inclinedy position i toward` said trayiat theiront end .ofi said trayfto. which, the `prints` lare delivered, means for rapidly oscillating said platel-fto dischargevsa'id prints'ftherefrom, a ducker com- 60 prising arotaiting paddle wlieel having vanes extending '.transverselyotiftray disposed adjacent said plate witlifits lower-'iside moving away from said plate and adjacent the bottom of said tray 65 to submerge prints in said liquid and induce a current of said liquid rearwardly of said tray.

6. A photo print handling device comprising a tray adapted to contain liquid, `means for 'feeding prints to said tray, a. plate extending in down- 70 wardly inclined position toward said tray at the front end of said tray to which the prints are delivered, means for oscillating said plate to discharge said prints, a ducker comprising a rotating paddle wheel having vanes extending trans- 75 ings supportedxon` said sid-emembersoftheifrarnet' said-trunnions resting,- in said openatop `hearings whereby said paddle wheel and. its: drivingiwheel wmaysbe'removed by :being lifted from saidube'ammi '"'in'gs i 9.-AI photo print handlingdevice comprisinigva" ,tray 'adaptedtoi containv liquid-,a a' submergingii means 'comprising a paddle'. wheel@adjacent''on'el end of said tray` aguider'mearisziccrirpisisingrfa; pluralityv of spaced rodsexte'nding alongr'one side of yand beneath said wheel,`V supportingimeanszior saidVV rods' to which i they` are l attachedV andi a 'f choring means for said supporting Lnreans;` said?? rods being removable `by slitting"- said ',supporti iai means from said anchoring means andiattached`V rods: l

` 10. As'photo print? handlingizzdevicehavirig' inl combination, a tray adapted-r tcrcontiatini;liqLii'd--l meansior deliveringprints-to: said :trayf afpl'atef: adjacent vsaid means extending" downwardlwinw inclined position toward and overA saidtrayiaxfrda carryingxsaid plate,` vopen`top1bearingsl carried. on said"v side i. members of? said I frame in .which Is'ai'dli4 said-trod; a vpin projecting irom'l said@` arme linlszt :adapted: to be oscillated havin-g1 a b'reat one "f end :in which said fpin extendswherebysaid :platey "1 can be" removed by` lifting said rodfffrom? -s'aiclfE bearings and moving 'the-same endwise-to: remove saidipiniromisaid bore: l

1-12'.V Afr-photo print handlingtfdevice#-havingfa' tray` and-a print guide means comprisingcai bari having a slot in its 2lowen sideaplurality. oifsmallw rods having their end portions bent at right angles and disposed in said slot parallel to said bar, said bar being swaged over said portions at the sides of said slot, said rods projecting downwardly into said tray to form a print guiding means. I

12. A photo print handling device having in combination, a tray, a pan in which said tray is disposed with the bottom of said tray spaced from the bottom of said pan, means for impelling liquid in said tray toward the rear end of said tray, said tray having inlet openings at its front` end communicating with said pan and means for progressively retarding the rearward movement of said liquid, said last mentioned means comprising a plurality of openings through the bottom of. said tray and spaced longitudinally thereof through which the liquid can pass as it reaches the rear portion of said tray to again move forwardly in said pan.

1 13. lA photo print handling device having in combination, a tray adapted to contain liquid, means for delivering prints to the forward end of said tray and guiding means adjacent said means and extending. downwardly toward and over said tray, said guiding means being pivoted about a transverse axis adjacent its upper end and means for oscillatably vibratingv said guiding means about said axis to causeit to feed .and discharge prints delivered thereto. p

`14. A photo print handling device having in combination, a tray adapted to contain liquid, a frame on which said tray is supported, a conveyor for delivering prints to said tray disposed at one end of said frame and comprising a wide endlessbelt, guide members at each end of said belt over which it travels, a driven roller disposed between said guide members and a rod over which said belt travels after passing around said driven roller, said rod having a free end whereby said belt can be removed over said free end and then moved away from said driven roller.

15. The structure set forth in claim 14, a conveyor frame carrying said guide members, means securing said conveyor frame to said rst mentioned frame, said rod being secured to said iirst having a drain opening at one end and a supporting means for said end of said pan movable to `position for lowering said end thereof for daining said pan.

17. A photo print handling machine having in u combination, a tray adapted to contain liquid, a frame on` whichsaid trayv is supported, a conveyor for delivering prints to said tray disposed vat one end of said frame and comprising spaced parallel endless belts, guide members at each end of said conveyor over which said belts travel, a

bers and a rod over which said belts travel after passing around said driven roller for pressing said belts against said driven roller, said rod being carried on said frame and having swiveling 'movement about an axis disposed centrally thereof and extending at right angles to the axis'of said rod. i

18.' A photo `print handling machine having in combination, .a tray for containing liquid for treating prints, means for feeding prints to the front end of said tray, means for submerging said prints in said liquid and causing said liquid to move toward the rear end of said tray, a pan Ain which said tray is supported, said tray andpan being substantially horizontal, said pan having a drain opening at one end and a supporting means fory said end of said pan having a movable element movable to position to shorten said supporting means for lowering said end of for draining the same.

19. A photo print handling machine having in combination, a pan containing liquid, a tray disposed in said pan with its bottom disposed above the bottom of said pan, said tray having means at'its front end for the entrance of liquid thereto from said pan, means adjacent the front of said tray for inducing the flow of said liquid into said tray and causing said liquid to flow toward the said pan vrear of said tray and meansfor decreasing the velocity of said liquid substantially uniformly across said tray as it approaches the rear of saidtray and causing said liquid at the rear end of said tray to become substantially quiescent whereby prints fioating in'said liquid will move with said liquid and. become substantially stationary at the rear end portion 'of said tray, said last mentioned means comprising a series of holes vthrough the bottom of-said tray spaced'longituldinally thereofv andspaced substantially unirear of said tray and means comprising holes driven roller disposed between said guide memthrough vthe bottom of said pan 'and spaced thereacross fork decreasing ythe velocity of said liquid substantially uniformly across said tray as it approaches they rear of said tray and causing i said liquid at the rear ofy said tray to'become substantially quiescent whereby prints floating in -saidfliquidy will move with said liquid substantially rectilinearly longitudinally thereof and become substantially stationary at the rear portion of saidtray in positions spacedntransversely ofi 

